package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.util.Objects;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        // 1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        // 2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            // 账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        // 密码比对，先对明文密码进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            // 密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (Objects.equals(employee.getStatus(), StatusConstant.DISABLE)) {
            // 账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        // 3、返回实体对象
        return employee;
    }

    @Override
    public Long save(EmployeeDTO employeeDTO) {
        // 拷贝员工属性
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);
        // 设置默认密码
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        // 设置用户状态
        employee.setStatus(StatusConstant.ENABLE);

        // 保存到数据库
        employeeMapper.insert(employee);
        // 查询新增的员工
        employee = employeeMapper.getByUsername(employee.getUsername());
        return employee.getId();
    }

    @Override
    public PageResult page(EmployeePageQueryDTO employeePageQueryDTO) {
        // 设置分页参数
        int page = employeePageQueryDTO.getPage();
        int pageSize = employeePageQueryDTO.getPageSize();
        PageHelper.startPage(page, pageSize);

        // 查询分页数据
        Page<Employee> data = employeeMapper.pageQuery(employeePageQueryDTO);
        PageInfo<Employee> pageInfo = new PageInfo<>(data);

        // 返回分页结果
        PageResult pageResult = new PageResult();
        pageResult.setTotal(pageInfo.getTotal());
        pageResult.setRecords(pageInfo.getList());
        return pageResult;
    }

    @Override
    public boolean updateStatus(Long id, Integer status) {
        Employee employee = Employee.builder()
                .id(id)
                .status(status)
                .build();
        int count = employeeMapper.update(employee);
        return count > 0;
    }

    @Override
    public Employee getById(Long id) {
        Employee employee = employeeMapper.getById(id);
        employee.setPassword("******");
        return employee;
    }

    @Override
    public boolean update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);

        int count = employeeMapper.update(employee);
        return count > 0;
    }

}
